/**
 * Copyright 2012-2020 The Feign Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package feign.jackson;

import java.lang.reflect.Type;
import java.util.Collections;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

import feign.RequestTemplate;
import feign.Util;
import feign.codec.EncodeException;
import feign.codec.Encoder;

public class JacksonEncoder2 implements Encoder {

	private final ObjectMapper mapper;

	public JacksonEncoder2() {
		this(Collections.<Module>emptyList());
	}

	public JacksonEncoder2(Iterable<Module> modules) {
		this(new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL)
				.configure(SerializationFeature.INDENT_OUTPUT, true).registerModules(modules));
	}

	public JacksonEncoder2(ObjectMapper mapper) {
		this.mapper = mapper;
	}

	@Override
	public void encode(Object object, Type bodyType, RequestTemplate template) {
		try {
			// 得到真正的业务类
			Class<?> requestType = object.getClass();
			JavaType javaType = mapper.getTypeFactory().constructType(requestType);
			template.body(mapper.writerFor(javaType).writeValueAsBytes(object), Util.UTF_8);
		} catch (JsonProcessingException e) {
			throw new EncodeException(e.getMessage(), e);
		}
	}
}
